Dynomax #17741 on my Daytona.

[boxcar]

I had pulled the stock muffler off of my VNT Daytona and just replaced it with a section of 2 1/4 pipe. This worked good but was a little noisy (I'm old) and of course the car would get into overboost in cooler weather.

I spotted the dynomax #17741 muffler on Summit's website and decided to give it a shot. I think this is the same muffler that they include in the cat-back kits Walker offers.

I was happy with the fact that the muffler is the same size as the stocker and comes with the factory style hanger welded on the back, all I had to do was fab up a reducer sleeve to adapt the 2 1/4" ID muffler down to the roughly 2" OD factory over-axle pipe and make a turndown for the end. Piece of cake.

I was a little concered that this muffler would be restrictive due to the small case size and being a reverse-flow design and on a modified, higher ouput car this would probably be the case. On my stone stock VNT however, this muffler works well. My ass-dyno tells me that the car pulls as well as the straight pipe up to about 5000 RPM then starts to nose over a bit but I shift the car about there anyways so I didn't care. No overboost as of yet either.

It's nice and quiet too, just a little louder than the stocker and nowhere near as restrictive. I think it ran me about $50 from Summit and they had it on my doorstep the day after I placed my order.

Pics

[DomChassis]

sweet a stock replacement muffler

[capev86]

do they make it in stainless or with other inlet diameter sizes?

[RPMurph]

they sell the over the axle pipe.....i have one sitting in my closet cause it doesnt fit a spirit...but i think it is soposed to fit a daytona

the end is made to meet up with your stock exhaust system...the end is 2" and it has a 1-7/8 band reducer also

[19omni87]

dynomax carries a cat back exhaust for the tonas that you can get from jegs and summit. only problem is im told they rust out quicker then most but who knows. i think autozone carries a 2 1/4 muffler thats a universal that is basically the same muffler as stock i got the stock size one from advanced all i had to do is get a small piece of extension pipe i got from autozone and cut the end off it all hooked right up for about 30 bux max i think

Also man that looks good stock is always good and to achieve the same placement and look as stock and better flow is always a good thing

[boxcar]

I decided to post these links to some of my older exhaust threads in case anyone wants to know what the stockers look/act like. It ain't pretty.

VNT muffler exposed

Backpressure test on factory VNT exhaust